Valve



LML'MQL C. F. SCHWENNKER.

VALVE. FILED MAR. 4. 1920.

Jan, 1923.

ltltitented dan, il, l

lil l wel nur fwn iti errantes eeuwen-unisa, or soi-inivnoianir, new venir, assrenoa ai@ @EMERMJ nrncrnic eoiv;rainer,V n conronarion or naar @mmm .tlpplication iiletl lllai'flh 4, 1920. Serial lilo. 363,332.

To all whom it may concern Y lie it known that l, @Hennes il. finir-riveriniuin, a citizen oi the lllnited States, residing at Schenectady, county of Schenectady, tritate of New lforlr, have invented. certain new and :useful improvements in Valves, oil which the following,v is a specification.

llfhe present invention relates to valves, particularly to valves adapted for use in connection with hydraulically operated devices such as presses and the lilre, and has for its object to provide an improved valve structure for use in the pipe-line through which fluid is supplied to such a press, which is in the nature of quiclr return valve and serves to control the connection ot the fluid pressure to the press, its disconnection therefrom, and the quiclr relief` of the pressure in the hydraulic device after an" operation has been performed.

ller aconsideration of what ll believe to be novel and my invention, `attention is directed to the accompanying description and the claims appended thereto.

ln the drawing, the figure is a view partly insection of a structure and arrangement embodying my invention.

Referring to the drawing, indicates a valve casing which is made in two parts fastened together by bolts 11 in order to 'facilitate assembling; in valve casing 10 is an admission opening` 12 to which is connected a supply pipe 13, and leadingu from casing 10 is a discharge opening 1i towhich is connected a conduit 15 which leads to an hydraulic press or other fluid actuated device, a portion oli which is indicated diagrammatically at 16. .ln valve easinglO'is also a chamber 17 from which leads a passage 13 connected to a waste conduit 19. lllaste conduit 19 may discharge to any suitable point. Between chamber 17 and discharge passage 111 isa valve seat 2O adapted to be engaged by a valve 21 which valve is of substantial length and is guided inv its movements by a cylindrical portion oi valve casing 10. lllxtending through valve 21 is a passage 22, the lower end of which is counterbored to receive a valve 23 which seats on a seat 24, formed onthe end of a nipple 25 which is threaded into the counterbored portion of passage 22. lllhe left hand end of the valve casing is enlarged to form a chamber 26 in which is located a iiange 27 formeel integral with valve 21. Valve 21 is normally held away from its seat 2U by spring 23 located in chamber 26, while valve-23is normally held on its seat by a spring` 29. 212L is a suitable packingl located in chamber 26 for preventing` leakage between valve 21 and the i valve casing. Conduit 13 may lead from any suitable source of supply of fluid pressure suoli as a` fluid pressure pipeline as indicated at 30, or a suitable pump. and in it is a two-way valve 31 which in one position permits fluid from pipe-line 30 to flow through` pipe 13 to the valve casing 10 and in another position cuts oliii communication be tween pipe 13 and supply conduit 30 and connects pipe 13 to apressure relief pipe 32. livowvay valve 31 is shown in the `present instance in .a diagrammatic manner as coinprising a simple rotary valve controlled by ahand lever 33, and this arrangement is to be taken as :indicative oi? any suitable hand controlled valve arrangement for accomplishing the purpose intended.

lll/'lien valve 31 is .in the position shown in the drawing, the supply of fluid pressure from conduit 30 to pipe 13 is cut ofi" and pipe 13 is connected to pressure relief pipe 32. The parts of the quick return valve will be in the positions shown in the drawing, valve 21 being` held open by spring' 28 so that conduit 15 is connected to discharge conduit 19, and valve 23 being' held closed Yby spring 29. lf now valve 31 is actuated to' shutoff cemmunication between pressure relief pipe 32 and pipe 13 and connects fluid pressure pipe-line 30 to pipe 13, such fluid pressure will immediatelv act on the end of valve 21, moving' the valve against the action of spring,` 23 to force valve 21 against its seat 20. This cuts ofi communication between discharge-passage 13 and conduit 15. At substantially the saine time, thefluid pressure opens valve 23 against the action oi' spring` 29 and fluid under pressure will flow from pipe 13 through passage 22 to conduit 15 to operate the hydraulic device 16. its soon as the operation o'l' the hydraulic 1nechanism is completed, two-way valve 31 thrown baclr to the position shown in the drawing, whereupon the supply of fluid pressure to pipe 13 is cut off and such pipe is connected again to pressure relief pipe 32. 'llhis immediately relieves the pressure under piston 25 with the result that spring 29 quickly closes valve 23 and the spring 23 quickly opens valve 21. The

`iuid pressure froci the hydraulic apparatus can now disehargJ `irough conduit 15 and passage le to chamber 17 and thence throuoh passage 18 and discharge conduit 19. in luid cannot', however.y flow hack through pipe i3 because of the closing of valve 23 which acts in substance as a nonreturn or check valve. The connection of conduit l5 to discharge conduit i9 lgives large area the discharge ot the fluid from the hydraulic device it and permits it to quickly return to its original position. .lt therefore possible with the arran ement il rated to obtain a. very rapid disan hydraulic device.

:use the advantage unnecessary ifo' the hydraulic dt vice to discharge tl nual vc. :e which controls the pressure to the device7 i. e.7 a valre suc-li. as the valve 3l. This is oit great athfantage as the pressures dealt with are often very high ainl it is extremely difficultto olitain a valve of the manually operated type which will jvc e'iiicient service When used lor 'flow in both directions7 and will not wear rapidly due to the flou' through it. lilith the present arrangement, the reverse tion' oi' iluid through the mannally controlled valve 3l is only that necessary to relieve the pressure in pipe 13 which amounts to vvery little.

ln accordance with the provisions' oi the patent statutes, l hare described the principle ot operation oit my invention, together with the apparatus which l now consider to represent the best embodiment thereof, out l desire to have it understood that the apparatus shown is only illustrative, and that the invention may he carried out hy other means.

lhat l claim as new and desire to secure hf; Letters Patent of the United States, isrl. The combination with an hydraulically operated device, ot a faire casino7 a conduit leading therefrom to said device, a discharge conduit connected to said casing, a normally open valve in said casing tor controlling communication between said tivo conduits a pressure conduit connected to said casing and adapted to supply fluid pressure to close said valve7 conduit means connecting` said iiiressure conduit to .said lirst named conduit`I and a non-return alvc in said conduit n'ieaus 2. The combination with an livdraulicalliy opei'zzicd device. olf a valve casiiur. a conduit leadingr t' )re'liroin to said device. a discharge conduit connected to said casing, a norinallv open valve in .said casing or coutrolliin y communication lietxvccn .said tivo conduits, a pressure conduit conmfcicd to `said casiir;r and adapted to supp-lj, fluid press-,nrc io clore said valve. a passage ivhi-h extends axially oi" idV valve and 1;. nornialli closed valvc in .said passug-e which pcrniit.L thc flou' ol' luid through it toivarfl .said device hut prf-venu` fion' olE fluid in the row-rse direction.

The coinliination with ao h}draulicall v operated device, olf a vuhc casing. a conduit ieatliup4 thereli'oin to said device. a discharge conduit connected to lsaid casing. a normallyv open vvalve in said casing for omitrollin,r communication hctueon said tivo conduitfli, a piston connected to .said valve` a cylinder in which it moves. a pressure conduit connected to said cylinder `for zulniiitin;r fluid presi-,ure thereto to close said valve, conduit cans inniectiuny said pressure conduit to l device. and a non-return valve l'or pre- ".cntiun` tloiv therethrough in a reverse direction.

rl`lie conihinatioi'i ivith an lvvdraulicallv operated device. ol a` valve casing. a conduit leadiimv therefrom to said device` a discharge condi t connected to said casing. a normall)v open valve in said casing! for controllin;r anninunication hetwecn said two conduits. a iifressurc conduit connected to said casing and av'lapted to supply liuid pressure to close said valve.. a passage which extends axially ot said valve; and a norinllv closed valve in said passage which permits the lloiv ol lluid through it toward said device hut prevents lioiv ofi luid in the reverse direction. :i source of 'iuid supply, a pressure relief pipe. and Vvalve means lor connecting; said pressure conduit to said source or to said relief pipe.

In Witness whereof. l have hereunto sel. inv hand this 2nd dav ot Warth. lSlQll.

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